Specific Surface
In accordance with BS: 4550 : Part 3
: Section 3.3.
The specific surface will vary
according to fineness and particle
shape. As ‘Delafila’ has a flaky
particle shape the Specific surface is
relatively high.
The ranges are as follows:
99 - 350 grade = 10,975 cm2 /gram
70 - 200 grade = 7,210 cm2 /gram
Relative Density
In accordance with BS: 812 : Part 2 :
1975
The relative density of ‘Delafila’ is
2.8
Bulk Density
In accordance with BS: 812 : Part 2 :
1975
Bulk density will vary according to
particle shape, size etc.
The ranges are as follows:
|
|
F20 Grade |
70 - 200
Grade |
In toluene |
|
0.23 g/ml |
0.56 g/ml |
Loose state |
|
444 kg/m3 |
833 kg/m3 |
Compacted
state |
|
1273 kg/m3 |
1595 kg/m3 |
MOHS Hardness
The hardness of the powder is a
function of the minerals present and
will vary from 2 - 7.
Abrasion
The abrasive properties of mineral
fillers depend on two factors:
- Mineral composition
- Fineness grading
A fine powder is less abrasive than a
coarse powder of the same mineralogical
composition. Delafila 99-350 grade is
about half as abrasive as Delafila
70-200 BSS. A quartz powder can be 7-10
times as abrasive as 99-300 BSS, and
some commercial talcs are more abrasive
than Delafila.
Electrical Conductivity
Carried out on 1% w/v in de-ionised
water.
Conductivity will vary according to
particle size for a suspension.
The ranges are as follows:
99 - 350 grade = 7.87 (uS/cm)
70 - 200 grade = 15.50 (uS/cm)
Environment Health & Safety
Slate is a naturally occurring
material that is inert and non-polluting
in its solid state. Pollution prospects
arise from powdered slate, which should
be kept slurrified or confined.
Waste Disposal
Unwanted material should be disposed
of in accordance with the “Duty of Care
– Control of Waste Regulations”, and any
local Government requirements (Note:
pollution prospects of powders as
above).
Hazards to Health
Hazards are generally associated with
poor handling and dust. Dust can be
harmful to health.
Precautions - Handling:
- operating lifting capabilities
must exceed 25kg
- use mechanical devices where
possible
- avoid the generation of dust
- use wet, if process allows
- if dust occurs, use a suitable
dust mask
Literature
A Powder & Granules brochure is
available which includes more detailed
information. Please select "BROCHURES"
from the menu at the top or
click here.
FOR FURTHER INFORMATION, A PERSONAL
QUOTATION OR TO PLACE AN ORDER, PLEASE
CONTACT OUR SALES TEAM VIA EMAIL (sales@delaboleslate.co.uk),
PHONE (01840 212242) or FAX (01840
212948)
|